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-rw-r--r--net/netfilter/xt_RATEEST.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/net/netfilter/xt_RATEEST.c b/net/netfilter/xt_RATEEST.c
index 498b54fd04d7..141c295191f6 100644
--- a/net/netfilter/xt_RATEEST.c
+++ b/net/netfilter/xt_RATEEST.c
@@ -39,23 +39,31 @@ static void xt_rateest_hash_insert(struct xt_rateest *est)
hlist_add_head(&est->list, &rateest_hash[h]);
}
-struct xt_rateest *xt_rateest_lookup(const char *name)
+static struct xt_rateest *__xt_rateest_lookup(const char *name)
{
struct xt_rateest *est;
unsigned int h;
h = xt_rateest_hash(name);
- mutex_lock(&xt_rateest_mutex);
hlist_for_each_entry(est, &rateest_hash[h], list) {
if (strcmp(est->name, name) == 0) {
est->refcnt++;
- mutex_unlock(&xt_rateest_mutex);
return est;
}
}
- mutex_unlock(&xt_rateest_mutex);
+
return NULL;
}
+
+struct xt_rateest *xt_rateest_lookup(const char *name)
+{
+ struct xt_rateest *est;
+
+ mutex_lock(&xt_rateest_mutex);
+ est = __xt_rateest_lookup(name);
+ mutex_unlock(&xt_rateest_mutex);
+ return est;
+}
EXPORT_SYMBOL_GPL(xt_rateest_lookup);
void xt_rateest_put(struct xt_rateest *est)
@@ -100,8 +108,10 @@ static int xt_rateest_tg_checkentry(const struct xt_tgchk_param *par)
net_get_random_once(&jhash_rnd, sizeof(jhash_rnd));
- est = xt_rateest_lookup(info->name);
+ mutex_lock(&xt_rateest_mutex);
+ est = __xt_rateest_lookup(info->name);
if (est) {
+ mutex_unlock(&xt_rateest_mutex);
/*
* If estimator parameters are specified, they must match the
* existing estimator.
@@ -139,11 +149,13 @@ static int xt_rateest_tg_checkentry(const struct xt_tgchk_param *par)
info->est = est;
xt_rateest_hash_insert(est);
+ mutex_unlock(&xt_rateest_mutex);
return 0;
err2:
kfree(est);
err1:
+ mutex_unlock(&xt_rateest_mutex);
return ret;
}